staging: rtl8712: Fix enqueue_reorder_recvframe()

The logic of this function was accidentally broken by a checkpatch
inspired cleanup.  I've modified the code to restore the original
behavior and also make checkpatch happy.

Fixes: 98fe05e2 ("staging: rtl8712: Remove unnecesary else after return statement.")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20200929103548.GA493135@mwanda


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>